address comment

python/src/test/java/org/apache/zeppelin/python/BasePythonInterpreterTest.java

@@ -33,6 +33,7 @@ import org.apache.zeppelin.interpreter.remote.RemoteInterpreterEventClient;
 import org.apache.zeppelin.interpreter.thrift.InterpreterCompletion;
 import org.junit.After;
 import org.junit.Before;
+import org.junit.Ignore;
 import org.junit.Test;
 
 import java.io.IOException;
@@ -354,7 +355,7 @@ public abstract class BasePythonInterpreterTest extends ConcurrentTestCase {
     assertEquals("%text world\n", context.out.getCurrentOutput().toString());
   }
 
-  //@Test
+  @Ignore("Flaky test, need to investigate why it fails")
   public void testRedefinitionZeppelinContext() throws InterpreterException {
     String redefinitionCode = "z = 1\n";
     String restoreCode = "z = __zeppelin__\n";

testing/env_python_3 with_flink_1_11.yml

@@ -3,22 +3,23 @@ channels:
   - conda-forge
   - defaults
 dependencies:
+  - pycodestyle
+  - numpy=1
+  - pandas=0.25
+  - scipy=1
+  - grpcio
+  - hvplot
+  - protobuf=3
+  - pandasql=0.7.3
+  - ipython=7
+  - matplotlib=3
+  - ipykernel=5
+  - jupyter_client=5
+  - bokeh=1.3.4
+  - panel
+  - holoviews
+  - pyyaml=3
   - pip
   - pip:
     - bkzep==0.6.1
     - apache-flink==1.11.1
-    - numpy==1.17.3
-    - pandas==0.25.0
-    - scipy==1.3.1
-    - grpcio==1.19.0
-    - hvplot==0.5.2
-    - protobuf==3.10.0
-    - pandasql==0.7.3
-    - ipython==7.8.0
-    - matplotlib==3.0.3
-    - ipykernel==5.1.2
-    - jupyter_client==5.3.4
-    - bokeh==1.3.4
-    - panel==0.6.0
-    - holoviews==1.12.3
-    - pycodestyle==2.5.0